If i took one dose of azithromycin for chlamidya and waited a week, could i donate blood and the antiboitics still work?

Yes: You can donate blood as soon as the antibiotic treatment is finished. Chlamydia, venereal warts (human papilloma virus), or genital herpes are not a cause for deferral if you are feeling healthy and well and meet all other eligibility requirements.

Azithromycin: The antibiotic would not have a detectable concentration in blood after 7 days following one dose.

Azithromycin for cha: you took azithromycin for chlamidya waited for a week.you could donate blood antibiotics still works up to 3 weeks